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/*-------------------------------------------------------------------------
*
* btstrat.c--
* Srategy map entries for the btree indexed access method
*
* Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/hash/Attic/hashstrat.c,v 1.12 1998/09/01 03:21:02 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include <postgres.h>
#include <access/hash.h>
#include <access/istrat.h>
/*
* only one valid strategy for hash tables: equality.
*/
#ifdef NOT_USED
static StrategyNumber HTNegate[1] = {
InvalidStrategy
};
static StrategyNumber HTCommute[1] = {
HTEqualStrategyNumber
};
static StrategyNumber HTNegateCommute[1] = {
InvalidStrategy
};
static StrategyEvaluationData HTEvaluationData = {
/* XXX static for simplicity */
HTMaxStrategyNumber,
(StrategyTransformMap) HTNegate,
(StrategyTransformMap) HTCommute,
(StrategyTransformMap) HTNegateCommute,
{NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL}
};
#endif
/* ----------------------------------------------------------------
* RelationGetHashStrategy
* ----------------------------------------------------------------
*/
#ifdef NOT_USED
static StrategyNumber
_hash_getstrat(Relation rel,
AttrNumber attno,
RegProcedure proc)
{
StrategyNumber strat;
strat = RelationGetStrategy(rel, attno, &HTEvaluationData, proc);
Assert(StrategyNumberIsValid(strat));
return strat;
}
#endif
#ifdef NOT_USED
static bool
_hash_invokestrat(Relation rel,
AttrNumber attno,
StrategyNumber strat,
Datum left,
Datum right)
{
return (RelationInvokeStrategy(rel, &HTEvaluationData, attno, strat,
left, right));
}
#endif
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